/*
 * cron4j - A pure Java cron-like scheduler
 * 
 * Copyright (C) 2007-2010 Carlo Pelliccia (www.sauronsoftware.it)
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version
 * 2.1, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License 2.1 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License version 2.1 along with this program.
 * If not, see <http://www.gnu.org/licenses/>.
 */
package com.jspx.crontab;

import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * A table coupling tasks with scheduling patterns.
 * </p>
 * 
 * @author Carlo Pelliccia
 * @since 2.0
 */
public class TaskTable {

/**
 * Table size.
 */
private int size = 0;

/**
 * Pattern list.
 */
private List<SchedulingPattern> patterns = new ArrayList<SchedulingPattern>();

/**
 * Task list.
 */
private List<Task> tasks = new ArrayList<Task>();

/**
 * Adds a task and an associated scheduling pattern to the table.
 * 
 * @param pattern
 *            The associated scheduling pattern.
 * @param task
 *            The task.
 */
public void add(SchedulingPattern pattern, Task task) {
patterns.add(pattern);
tasks.add(task);
size++;
}

/**
 * Returns the size of the table, representing the number of the elements
 * stored in it.
 * 
 * @return The table size.
 */
public int size() {
return size;
}

/**
 * Returns the task at the specified position. Valid positions are between
 * <em>0</em> to <em>{@link TaskTable#size()} - 1</em>.
 * 
 * @param index
 *            The index.
 * @return The task at the specified position.
 * @throws IndexOutOfBoundsException
 *             If the supplied index is out of range.
 */
public Task getTask(int index) throws IndexOutOfBoundsException {
return tasks.get(index);
}

/**
 * Returns the scheduling pattern at the specified position. Valid positions
 * are between <em>0</em> to <em>{@link TaskTable#size()} - 1</em>.
 * 
 * @param index
 *            The index.
 * @return The scheduling pattern at the specified position.
 * @throws IndexOutOfBoundsException
 *             If the supplied index is out of range.
 */
public SchedulingPattern getSchedulingPattern(int index)
throws IndexOutOfBoundsException {
return patterns.get(index);
}

/**
 * Remove a task from the table.
 * 
 * @param index
 *            The index of the task to remove.
 * @throws IndexOutOfBoundsException
 *             If the supplied index is not valid.
 * @since 2.1
 */
public void remove(int index) throws IndexOutOfBoundsException {
tasks.remove(index);
patterns.remove(index);
size--;
}

}